NEET Biology question

Which one of the following palindromic base sequences in DNA can be easily cut at about the middle by some particular restriction enzyme?

(A)5'–CGTTCG–3' / 3'–GCAAGC–5'
(B)5'–GATATG–3' / 3'–CATATC–5'
(C)5'–GAATTC–3' / 3'–CTTAAG–5'Correct
(D)5'–CACGTA–3' / 3'–GTGCAT–5'

Answer: (C)

Solution

A sequence is palindromic, and hence cleavable at its centre by a restriction enzyme, only when it reads identically 5' to 3' on both strands; the sequence 5'-GAATTC-3' paired with its complementary

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Question ID VK-125422